ioscan causes system crash

[Anthony Hill]

What can I begin checking to find out why ioscan would cause my system to crash?

[James R. Ferguson]

Hi:

"Crash"? Please define that further. Also, exactly what command syntax are you using?

In the meantime, have a look at '/var/adm/syslog/syslog.log'.

Regards!

...JRF...

[Santosh Nair_1 · Accepted solution]

Since ioscan touches all the hardware on the system, I would look to see if you have some faulty device. Check /var/adm/syslog/syslog.log to see if there are any errors, specifically relating to hardware problems. Also, if the system paniced, you should have a system dump in /var/adm/crash. You can do a Q4 analysis (see the following URL for details):
http://forums.itrc.hp.com/cm/QuestionAnswer/1,11866,0x2dc6cf38d6bdd5118ff10090279cd0f9,00.html

on the crash dump and look for HPMC errors...this again would indicate hardware problems. Finally, check the tombstones (for HPUX 11.0 and above) in /var/tombstones. The latest one is called ts99 in this directory.

Was there any recent hardware changes to this machine?

-Santosh

[Rita C Workman]

You can try the following:
1. Check /var/adm/syslog/OLDsyslog.log
...look for any messages
2. Check
/etc/shutdownlog
...look for panic message and some reason

I have had ioscan go 'flippy' on me because I had forgotten to load a patch PHSS_18742 or 43 depending on O/S.

Without some further info...like messages, your system config, etc...it's hard to say. Also, does your system come back up ok?? Are there any messages on your LED panel on the box?...could it be a flacky power supply or controller?....

Just some thoughts & ??'s that come to mind,
Rit

[James R. Ferguson]

Hi (again):

It might also be informative to limit the 'ioscan' to only the kernel's view and/or usable devices. For instance, if 'ioscan -fn' fails, does 'ioscan -kfn' or 'ioscan -ufn' fail too? [ The -k or -u options suppress scanning actual hardware ].

Regards!

...JRF...

[Roger Baptiste]

Anthony,

Are you sure it was IOscan
which crashed the system??
""Normally"", Ioscan command
hangs if it can''t find out
a hardware which is listed
in the kernel.
Check whether there were
any changes done to /etc/ioconfig and
/stand/ioconfig files, by
looking at their timestamps.

#run ioscan with -k option
which reads the kernel
rather than scanning
the hardware.
ioscan -nkf >/tmp/ios.out
go through the file and
make sure you see everything
out there.

#Make sure the system is patched.

#Analyse the crash dump (q4)

#have a look at the syslog
and shutdown.log file.

-raj

[Bill McNAMARA_1]

ioscan -fnk
should not crash

You should have errors after startup in /etc/rc.log
and dmesg

This may give you the clue.

If you have fibre channel you may have a duplicated loop id.

Remove fibre links or analyse which one is wrong.

Does bdf crash? If it does, then you probably have some scsi problem not fibre.

Later,
Bill

[Anthony Hill]

Thank you all. A hardware call has been logged and I hope to have this resolved soon.

Regards,
Anthony.